NET INCOME PER SHARE ATTRIBUTABLE TO HEICO SHAREHOLDERS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Numerator:
Net income attributable to HEICO	$ 42,002	$ 34,369	$ 111,930	$ 95,114
Denominator:
Weighted Average Number of Shares Outstanding, Basic	67,126	66,813	66,975	66,706
Effect of dilutive stock options	1,152	1,088	1,107	1,084
Weighted Average Number of Shares Outstanding, Diluted	68,278	67,901	68,082	67,790
Earnings Per Share, Basic	$ 0.63	$ 0.51	$ 1.67	$ 1.43
Earnings Per Share, Diluted	$ 0.62	$ 0.51	$ 1.64	$ 1.40
Anti-dilutive stock options excluded	574	445	675	352